I have a what may be a 426 TMPHC made in November 1962 from a factory short block. The stamp font is wrong so I am trying to document the parts. It has OEM 2463987 STD pistons in it ......the dome doesn't look like 13.5 to me but I can't cross this number. They are new so the number is very clear. Does anyone have this number associated with a 426? What is the cr for this? I am also trying to determine if the cylinder notches are machined or ground.
Any help is appreciated.
Any help is appreciated.















